On NGS group, we are studying Julia Andrus' book "Paper Transformed", this week we are studying the section "Lapis Lazuli". This technique uses alcohol inks to imitate the look of Lapis Lazuli. Drizzle three shades of blue alcohol inks on to a felt applicator and pounce over glossy paper.
Let dry and repeat two more times. On the third time, add a small amount of brown alcohol ink.